Prosecution Insights
Last updated: May 29, 2026

Examiner: BREWSTER, HAYDEN R

Tech Center 1700 • Art Units: 1672 1700 1773 1779

This examiner grants 62% of resolved cases

Performance Statistics

61.9%
Allow Rate
-3.1% vs TC avg
580
Total Applications
+48.4%
Interview Lift
1227
Avg Prosecution Days
Based on 544 resolved cases, 2023–2026

Rejection Statute Breakdown

0.4%
§101 Eligibility
2.7%
§102 Novelty
78.7%
§103 Obviousness
6.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18127027 ACTIVE MATERIAL SEPARATION APPARATUS Non-Final OA HONDA MOTOR CO., LTD.
18305597 LOGIC FOR CONTROL OF WATER FLOW THROUGH A SCREEN ASSEMBLY Final Rejection Duperon Innovation LLC
18017044 COMPOSITIONS AND METHODS FOR TREATING AQUARIUM WATER Final Rejection Spectrum Brands, Inc.
18147954 BIOLOGICAL WASTEWATER PROCESSING SYSTEM AND METHOD FOR PROCESSING THE SAME Non-Final OA INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
18248885 WASTEWATER FOAM CONTROL AGENT Final Rejection Dow Global Technologies LLC
18564782 PURE WATER PRODUCTION METHOD AND PURE WATER PRODUCTION APPARATUS Non-Final OA ORGANO CORPORATION
18249325 SAMPLE COLLECTION APPARATUS AND METHODS FOR IMMUNOASSAY TESTING Non-Final OA Siemens Healthcare Diagnostics Inc.
18555099 WATER SOFTENER SYSTEM Non-Final OA NUVO RESIDENTIAL, LLC DBA NUVOH2O
18231266 ROLL-TYPE DEVICE FOR ELECTROCHEMICAL RECOVERY OF AMMONIA, AND METHOD FOR ELECTROCHEMICAL RECOVERY OF AMMONIA Non-Final OA Guangdong University of Technology
18569731 CROSSFLOW FILTER DEVICE Non-Final OA SARTORIUS STEDIM LAB LIMITED
18536595 Method And Reactor Device For Disinfecting Water By Means Of UV Lighting Non-Final OA HYTECON AG
18013786 SYSTEM AND METHOD FOR WATER TREATMENT WITH VENTURI PLASMA DISCHARGE Final Rejection Onvector LLC
18561252 A METHOD FOR PURIFYING A FEED IN A CHROMATOGRAPHY SYSTEM Non-Final OA CYTIVA BIOPROCESS R&D AB
18005577 PIEZOELECTRIC AND PIEZOCATALYTIC COMPOSITE MATERIAL, AND METHODS OF USING AND FORMING IT Non-Final OA UCL BUSINESS LTD
18286266 DOMESTIC AUTOMATIC EXTRACTION DEVICE FOR EXTRACTING AN OIL SUBSTANCE FROM PLANT MATERIAL Non-Final OA TINCOIL LTD.
18552201 METHOD FOR TREATING FEED WATER USING A BIOSTRATUM AND FILTRATION MEDIA Non-Final OA DDP SPECIALTY ELECTRONIC MATERIALS US, LLC
18246301 PROCESS FOR PREPARING EXTRACELLULAR VESICLES Non-Final OA Lonza Sales AG
18460181 Hot Tub Filterwell Dispersant Technology Non-Final OA King Technology, Inc.
18460196 Hot Tub Filterwell Dispersant Technology Non-Final OA King Technology, Inc.
18311007 EVAPORATION PANEL SYSTEMS AND METHODS Non-Final OA ECOVAP, INC.

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